US7696897B2 - Shelf-like display machine and image display method - Google Patents

Shelf-like display machine and image display method Download PDF

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Publication number
US7696897B2
US7696897B2 US11/822,957 US82295707A US7696897B2 US 7696897 B2 US7696897 B2 US 7696897B2 US 82295707 A US82295707 A US 82295707A US 7696897 B2 US7696897 B2 US 7696897B2
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Prior art keywords
shelf
image
optical path
display machine
path length
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US11/822,957
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US20080055087A1 (en
Inventor
Youichi Horii
Tadaaki Ishikawa
Takeshi Hoshino
Isshu Nakajima
Yukinobu Maruyama
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Hitachi Ltd
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Hitachi Ltd
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B37/00—Panoramic or wide-screen photography; Photographing extended surfaces, e.g. for surveying; Photographing internal surfaces, e.g. of pipe
    • G03B37/04—Panoramic or wide-screen photography; Photographing extended surfaces, e.g. for surveying; Photographing internal surfaces, e.g. of pipe with cameras or projectors providing touching or overlapping fields of view
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/005—Projectors using an electronic spatial light modulator but not peculiar thereto
    • G03B21/006—Projectors using an electronic spatial light modulator but not peculiar thereto using LCD's
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/13—Projectors for producing special effects at the edges of picture, e.g. blurring
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09F—DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
    • G09F19/00—Advertising or display means not otherwise provided for
    • G09F19/12—Advertising or display means not otherwise provided for using special optical effects
    • G09F19/18—Advertising or display means not otherwise provided for using special optical effects involving the use of optical projection means, e.g. projection of images on clouds
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/001—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background
    • G09G3/002—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes using specific devices not provided for in groups G09G3/02 - G09G3/36, e.g. using an intermediate record carrier such as a film slide; Projection systems; Display of non-alphanumerical information, solely or in combination with alphanumerical information, e.g. digital display on projected diapositive as background to project the image of a two-dimensional display, such as an array of light emitting or modulating elements or a CRT
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2380/00—Specific applications
    • G09G2380/04—Electronic labels

Definitions

  • This invention relates to a shelf-like display machine and an image display method, for example, in which shelves or the like installed at stores such as retailers have an image display function.
  • the aforesaid prior art had a problem that it is hard to attain a correspondence between the display part and the goods under a certain arrangement of the goods because the display part with an electronic paper is arranged at a part of the shelf.
  • this invention provides a shelf-like display machine and an image display method in which an optical path of a light source such as a projector for projecting an image is controlled to display some images at the ends of plural shelf plates.
  • a shelf-like display machine comprising a light source for outputting an image; a first reflector member for reflecting the image projected from the light source; a first shelf plate and a second shelf plate in which light can be transmitted through their inner portions; a rear member supporting the first and second shelf plates in which light can be transmitted at their inner portions; a second reflection member for guiding the image reflected by the first reflector member and guided through the rear member to the first shelf plate; and a third reflector plate for guiding the image reflected by the first reflector member and guided through the rear plate to the second shelf plate; the image having a first image and a second image, the light source outputting the first image and the second image upon performing a correction processing in correspondence with an optical path length 1 ranging from the light source to the end of the first shelf plate and an optical path length 2 ranging from the light source to the end of the second shelf plate in such a way that the first image is displayed at the end of the first shelf plate opposite to the rear member and the
  • the present invention provides a method in which when an image is displayed at plural screens arranged in spaced-apart relation, plural regions are extracted from the original image under a similar shape to that of the plurality of screens and while keeping positional relations of the plurality of screens; the plurality of regions are extracted while being scrolled at a predetermined speed in a direction connecting the plurality of regions; each of the regions is enlarged or reduced in such a way that a difference in the magnifying power may be corrected in reference to a difference in optical path length ranging from the light source to each of the screens so as to display the image to each of the screens.
  • the present invention provides an image display method for displaying an image on the spaced-apart first and second screens which includes the steps of extracting a first region of which shape is similar to that of the first screen and a second region of which shape is similar to that of the second screen from the image while keeping a positional relation between the first and second screens; extracting the first region and the second region from the image while scrolling them at a predetermined speed in a direction where the first region and the second region are connected, correcting a difference in magnifying power caused by different optical path lengths ranging from a light source for projecting the image to each of the screens and correcting to expand or reduce the first region and/or the second region; and projecting the first region to the first screen and the second region to the second screen.
  • FIGS. 1A , 1 B, and 1 C are schematic views for showing one preferred embodiment of the present invention.
  • FIGS. 2A and 2B show a first image generation method of one preferred embodiment of the present invention
  • FIG. 3 shows a second image generation method of one preferred embodiment of the present invention
  • FIG. 4 shows a third image generation method of one preferred embodiment of the present invention
  • FIG. 5 shows a fourth image generation method of one preferred embodiment of the present invention
  • FIGS. 6A , 6 B, and 6 C show a fifth image generation method of one preferred embodiment of the present invention
  • FIG. 7 is an illustrative view for showing a size inputting means of a shelf display machine
  • FIGS. 8A , 8 B, and 8 C are illustrative views for showing a first image adjustment method
  • FIG. 9 is an illustrative view for showing a second image adjustment method
  • FIGS. 10A , 10 B, 10 C, 10 D, 10 E, and 10 F show some examples of a reflector member
  • FIGS. 11A , 11 B, 11 C, and 11 D show some examples of a display end
  • FIGS. 12A , 12 B, and 12 C show some examples of a mechanism for performing a fine adjustment of an optical reflection
  • FIG. 13 is an illustrative view for showing a first structure for projecting an image to a location other than the end of a shelf of one preferred embodiment of the present invention
  • FIG. 14 is an illustrative view for showing a second structure for projecting an image to a location other than the end of a shelf of one preferred embodiment of the present invention
  • FIG. 15 is an illustrative view for showing a third structure for projecting an image to a location other than the end of a shelf of one preferred embodiment of the present invention.
  • FIG. 16 is an illustrative view for showing a first structure in which optical path lengths in one preferred embodiment are substantially the same to each other;
  • FIG. 17 is an illustrative view for showing a second structure in which optical path lengths in one preferred embodiment are substantially the same to each other;
  • FIG. 18 is an illustrative view for showing a third structure in which optical path lengths in one preferred embodiment are substantially the same to each other;
  • FIGS. 19A and 19B are illustrative views for showing a first structure for projecting an image to the side of a shelf of one preferred embodiment of the present invention.
  • FIGS. 20A , 20 B, and 20 C are illustrative views for showing a second structure for projecting an image to the side of a shelf of one preferred embodiment of the present invention
  • FIGS. 21A , 21 B, 21 C, and 21 D show a first shelf-like display machine provided with a sensor of one preferred embodiment of the present invention
  • FIGS. 22A , 22 B, and 22 C show a second shelf-like display machine provided with a sensor of one preferred embodiment of the present invention.
  • FIGS. 23A , 23 B, 23 C show a third shelf-like display machine provided with a sensor of one preferred embodiment of the present invention
  • FIGS. 24A and 24B show a fourth shelf-like display machine provided with a sensor of one preferred embodiment of the present invention
  • FIG. 25 shows examples of letters to be displayed at a display end
  • FIG. 26 is an illustrative view for showing a first structure for displaying an image at the back of a shelf of one preferred embodiment of the present invention
  • FIGS. 27A , 27 B, 27 C, and 27 D are illustrative views for showing a second structure for displaying an image at the back of a shelf of one preferred embodiment of the present invention
  • FIGS. 28A and 28B are illustrative views for showing a third structure for displaying an image at the back of a shelf of one preferred embodiment of the present invention.
  • FIG. 29 is a view for showing a state in which display devices are arranged at the rear of a shelf to display images
  • FIG. 30 is a view for showing a state in which a rear projector is arranged at the rear of each of the shelves to display an image
  • FIGS. 31A and 31B show an example in which an image is displayed at the back of shelves of one preferred embodiment of the present invention.
  • FIG. 32 is an illustrative view for showing the structure of the prior art.
  • FIGS. 1A to 1C show a side elevational view and a front elevational view of shelves of one preferred embodiment and an example of display of images to be projected to a projector. As shown in the side elevational view of FIG. 1A and the front elevational view of FIG.
  • the image can be projected onto the ends also by constituting the shelf plates in such a way that when light transmitted at their inner portions to both front and rear of the shelves, the light shows total internal reflection there even if the screen raw material is not used.
  • An image generating device such as a PC 130 or the like is connected to the projector 110 so as to output images including images 141 , 142 , and 143 to be displayed at each of the shelves as shown at 140 in FIG. 1C .
  • an up-and-down reversal function of the projector it is set whether or not the up-and-down of the image to be sent to the projector is performed.
  • FIG. 1C shows a reversed example.
  • the image generating device is connected to the network such as LAN, for example, and it is also applicable that the content of the outputted image is controlled from outside.
  • arrangement of sensors 150 , 151 , 152 , and 153 also enables an approaching of a person near the shelf or a person's touch at the shelf to be detected and a displayed content to be dynamically changed.
  • FIGS. 2 to 5 there will be described a method for generating an image for each of the shelves to be projected to the projector of the present invention.
  • the number of shelves can be calculated by a similar method whatever numbers may be applied. More practically, this method is carried out by inputting the design values such as shelf height or shelf width (Z 0 a , Z 0 b , Z 0 c , Z 1 a , Z 1 b , Z 1 c , Z 2 a , Z 2 b , and Z 2 c of 201 to 209 in FIG.
  • Z 0 , Z 1 , and Z 2 of 240 to 242 in FIG. 3 can be attained in reference to their design values as follows.
  • Z 0 ( Z 0 a+Z 0 b+Z 0 c )
  • Z 1 ( Z 1 a+Z 1 b+Z 1 c )
  • Z 0 Z 2 ( Z 2 a+Z 2 b+Z 2 c )( Z 0+ Z 1)
  • thicknesses Y 0 h , Y 1 h , and Y 2 h of each of the shelves from 250 to 252 and a width Xt ( 270 ) of each of the shelves are also design values.
  • drawing regions (H 0 L, H 1 L, H 2 L, H 2 R, H 1 R, H 0 R) of the images to be projected to the end of the shelf are calculated in reference to the design values such as each of the sizes of the shelf (Z 0 , Z 1 , Z 2 : height, Xt: width, ⁇ : image angle ( 280 ) in a horizontal direction of the projector, H: a resolution in a horizontal direction of the projector).
  • H 1 L H*(Z 1 *tan ⁇ )/X 1
  • H 1 R H H*(Z 1 *tan ⁇ )/X 1
  • H 2 R H H*(Z 1 +Z 2 )*tan ⁇ )/X 1 .
  • FIG. 5 there will be described a method for calculating values of the projector in its vertical direction. That is, drawing regions of image to be projected to the end of the shelf (V 0 t , V 0 b , V 1 t , V 1 b , V 2 t , V 2 b ) are calculated in reference to the design values of the shelf (Z 0 , Z 1 , Z 2 : height, Y 0 h , Y 1 h , Y 2 h : shelf thickness, p: image angle in a vertical direction and Ys( 330 ), Ym( 331 ) got by a mounting angle of the projector.
  • a length Y 2 ( 310 ) in a vertical direction in a projection range at the upper stage is (Z 0 +Z 1 +Z 2 )/tan ⁇ .
  • a rate among the lengths Y 0 ( 311 ), Y 1 ( 312 ) and Y 2 ( 310 ) when the optical path to be projected to the end of each of the shelf plates is extended and the clearance lengths Yk 2 ( 313 ), Yk 1 ( 314 ), Yk 0 ( 315 ) becomes a rate in a vertical direction of the original image.
  • each of the vertical and lateral resolutions of the original image (the number of pixels) shall be defined as Vi( 410 ) and Hi( 411 ), respectively.
  • This input screen 450 for the design values will be described as follows.
  • This input screen can be set through PC outputting the images, for example.
  • Reference numeral 451 denotes a region for inputting the number of shelves and reference numerals 452 , 453 , and 454 denote a region for inputting a height from the lower stage, a region for inputting a shelf thickness and a region for inputting the deep size of a shelf, respectively, and each of them corresponds to Z 0 b , Y 0 h , and Z 0 c .
  • reference numerals 455 , 456 , and 457 correspond to Z 1 b , Y 1 h , and Z 1 c and reference numerals 458 , 459 , and 460 correspond to Z 2 b , Y 2 h , and Z 2 c .
  • the design values are inputted, and the coordinate system for the image to be outputted is calculated with the PC 130 and projected to the projector 110 .
  • FIGS. 8A , 8 B, and 8 C there will be described a method for fine adjusting a value of image area displayed at the projector calculated in reference to the design values with a graphical user interface.
  • the screen calculated by the aforesaid method is displayed as shown in FIG. 8A under a state in which the display is connected to the PC 130 connected to a pointing device.
  • Each of reference numerals 141 , 142 , and 143 in FIG. 8A denotes the image display region at each of the upper stage, middle stage and lower stage, and rectangles for rubber band indicated at 501 , 502 , and 503 are displayed at the right lower portion of each of the rectangles.
  • a button for the pointing device is depressed ( 510 ) under a state in which cursors are present on these pointing devices and the cursor position ( 511 ) when the button is released is applied as a coordinate at the right lower portion of a new rectangle ( 512 ).
  • the button is depressed ( 520 ) under a state in which the cursor is present within the rectangles 141 , 142 , and 143 and also within the region other than the rectangles for the rubber bands
  • a difference between the horizontal direction and the vertical direction with respect to the coordinate ( 521 ) of the cursor when the button is depressed is added to the left upper coordinate and the right lower coordinate is applied as a coordinate for a new rectangle ( 522 ).
  • FIG. 9 there will be described a fine adjustment for a clipping region.
  • On the original image 540 are displayed clipping regions 430 , 431 , and 432 and the rectangles for a rubber band similar to that of FIG. 8 .
  • the rectangles 530 , 531 , and 532 for the rubber band are selected within the clipping region, a width of the clipping region in a vertical direction is adjusted and when other rectangles are selected, a position of the clipping region in a vertical direction is adjusted. Also in this case, these operations are carried out through a drug-and-drop with a mouse.
  • FIGS. 10A to 10F there will be described examples of a structure of the shelf-like member.
  • Requirements necessary for the structure of the shelf-like member of the present invention consist in the fact that light projected from below is reflected at the back of the shelf by about 90° and then projected to the end of the shelf.
  • each of the left sides corresponds to the front of the shelf where the image is displayed and each of the right sides corresponds to the back of the shelf where the light is reflected by about 90°.
  • FIG. 10A to 10F each of the left sides corresponds to the front of the shelf where the image is displayed and each of the right sides corresponds to the back of the shelf where the light is reflected by about 90°.
  • FIG. 10A shows an example in which a screen 602 having a function for dispersing or focusing light is attached to the front of a block 601 such as acryl resin or glass having a high transmittance of light and a mirror 603 is arranged at the back of the block in an inclined state.
  • a block 601 such as acryl resin or glass having a high transmittance of light
  • a mirror 603 is arranged at the back of the block in an inclined state.
  • FIG. 10B shows an example in which an end 605 at the back of the block 604 is machined to show a slant surface in place of the mirror and a screen 606 is arranged at the front of the block under utilization of characteristic of total reflection of light at this surface. Since this structure does not show any displacement of the mirror, a re-adjustment by vibration or the like after its correct design is not necessary.
  • FIG. 10B shows an example in which an end 605 at the back of the block 604 is machined to show a slant surface in place
  • FIG. 10C shows an example in which a mirror 608 is arranged at the back lower portion of a transparent or opaque top plate 606 , a rod-like raw material 608 such as acryl resin or glass with a high light transmittance is arranged at the lower portion of the front and a screen 609 is arranged.
  • This structure enables utilization of expensive transparent raw material such as acryl resin or the like to be reduced.
  • FIG. 10D shows an example in which a screen 611 with a frame is arranged at the lower portion of the front of the top plate 601 , and a rod-like raw material 612 of high light transmittance such as acryl resin or glass and the like machined to have a slanted state in respect to the shelf plate surface such as a triangular column or truncated trapezoid column, for example, is arranged at the lower portion of the back of the shelf.
  • Light projected from below shows a total reflection at the slant surface of the acryl resin rod 612 and is projected to the screen 611 .
  • This structure enables a strain of the reflector member to be reduced more as compared with that of a planer-like mirror.
  • FIG. 10E shows an example in which a screen 614 with a frame is arranged at the lower portion of the front of the top plate 613 , and a mirror 615 is arranged at the lower portion of the back of the shelf.
  • This structure does not require at all using an expensive transparent raw material such as acryl resin or the like.
  • FIG. 10F shows an example in which a mirror 617 is arranged at the lower portion of the back of the top plate 616 , a frame 618 for assuring a strength is arranged at the lower portion of the side and a screen 619 with a frame is arranged at the lower portion of the front of the shelf.
  • This structure enables light to be prevented from being leaked out of the side of the shelf plate.
  • FIGS. 11A to 11C there will be described shapes of the shelf. As has been described up to now, it is also possible to apply a shape as follows, for example, in addition to a shelf of cubic-block shape.
  • FIG. 11A shows an example in which an end 630 of the shelf where the image is displayed has a curved surface. When some letters are expressed to scroll at the end in a lateral direction, this structure can provide an effect that the letters are seen to flow in a cubic manner in a forward or rearward direction.
  • FIG. 11B shows an example in which an end 631 is machined into a slant surface and its display area is made wide. This structure improves a visual recognition when the shelf is mounted at a level lower than a customer's point of view, for example.
  • FIG. 11C shows an example in which a band-like screen raw material 632 is partially attached to a block-like transparent raw material 633 so as to project the image in a curved surface shape.
  • This structure can provide an effect that as if the image is displayed in the air.
  • FIG. 11D shows an example in which an incident part 634 for an image is a curved surface and a projecting surface 635 for the image is also a curved surface. This structure enables a strain of the image to be reduced when the image is displayed in a cubic form.
  • FIGS. 12A to 12C there will be described a mechanism for use in performing a fine adjustment of reflection of light at the back of a shelf.
  • a shelf 650 is fixed under application of a hinge 652 capable of freely bending a mirror 651 arranged at the back of a shelf 650 .
  • an angle of the mirror 651 can be adjusted by arranging a spacer 654 between the shelf 650 and a structure 653 supporting the shelf and moving the spacer in a forward or rearward direction.
  • the shelf 655 is placed at the structure 656 for supporting the shelf and then a transparent raw material 657 of triangular column machined to form a slant surface, for example, is connected to the shelf 655 by a fixing tool 658 .
  • the transparent raw material 657 can be turned freely and its reflecting angle can be adjusted.
  • the shelf 659 of transparent raw material machined into a slant shape is placed at the structure 660 supporting the shelf in such a way that its back may be contacted with the ground surface of the structure, and a spacer 661 is arranged at the front of the shelf 659 .
  • a reflecting angle at the back can be adjusted by moving up or down the height of the spacer 661 .
  • FIG. 13 shows a side elevational view and a front elevational view of a shelf.
  • the image projected by the projector 110 is reflected upward by a mirror 111 , passes through a shelf 670 of transparent raw material, is reflected downward by a mirror 671 mounted at the lower portion of the shelf and the image is projected to a screen 672 arranged at the upper portion of the shelf. Projection of the image onto the upper surface of the shelf through this method enables an image to be projected to goods placed on the shelf or the image to be displayed around the goods.
  • FIG. 14 there will be described a method for projecting an image to the screen arranged at a shelf in a vertical orientation.
  • the image projected by the projector 110 is reflected by the mirror 111 and the mirror 680 and projected to the screen 681 arranged at the upper surface of the shelf. Projection of an image to a vertical screen by this method enables an image of existing standard of 4:3, for example, to be displayed.
  • FIG. 15 there will be described a method for projecting an image to a back between the shelves.
  • a part of the image projected by the projector 110 is reflected by the mirror 111 as described above, reflected by the mirrors 690 and 691 and projected to the screens 692 and 693 at the ends of the shelf.
  • a part of another image is projected to the screens 694 and 695 applied to the surface of a deep part between the shelves.
  • a resolution of the image to be projected to the screen 695 is decreased.
  • the resolution can be increased by machining the back 696 of the shelf into a slant surface or widening the depth size, adjusting both position and angle of the mirror 111 and making the incident angle to the screen 695 deeper.
  • optical path lengths from the projector to each of the screens are different from each other, the methods described above up to now correct the image projected from the projector so as to correct a difference in magnifying powers caused by the difference in optical path length and perform an output display.
  • setting the optical path lengths ranging from the projector to each of the screens substantially equal to each other in this preferred embodiment eliminates an image correcting processing.
  • the preferred embodiment has an effect that the focal point is strictly set for every image because the optical path lengths ranging from the projector to each of the screens are substantially set equal to each other. This situation will be described in detail as follows.
  • Image projected from the projector 110 is projected to screens 701 , 702 and 703 at the ends of the shelves in the same manner as described above.
  • the optical path lengths can be set substantially the same to each other by adjusting the depths 704 , 705 , and 706 in such a way that the distances at this time ranging from the projector 110 to the ends 701 , 702 , and 703 of the shelves may become constant.
  • FIG. 17 there will be described a method for increasing the number of times of reflection and adjusting an optical path length.
  • a part of the image projected from the projector 110 is reflected by mirrors 711 , 712 , 713 , and 714 and projected to a screen 715 at the end of a shelf.
  • another part of the image is reflected by mirrors 721 , 722 , 723 , and 724 and projected to a screen 725 at the end of a shelf.
  • the image may be projected to a screen 733 at the end of the shelf through twice reflection at the mirrors 731 and 732 in the same manner as described up to now.
  • the optical path lengths can be set substantially the same to each other by adjusting distances between the mirrors 712 and 713 , and the mirrors 722 and 723 in such a way that the optical path lengths become constant with an optical path length ranging from the projector 110 to the screen 733 .
  • FIG. 18 there will be described a method for aligning focal points by making a surface shape of each of the mirrors mounted at the backs of the shelves. That is, a correction is carried out by changing a curvature of the mirror in response to an optical path length for every shelf in such a way that a focal point is set to the end of each of the shelves.
  • Its structure is similar to that shown in FIG. 1 ; in which when a mirror 740 at the upper-most shelf, for example, is set to have a flat surface, the focal point of the projector is aligned with the end of the upper-most shelf.
  • the surface shapes of mirrors 741 and 742 at other shelves are set to show curved surfaces curved in a vertical direction, thereby a displacement of focal points at the images projected at the end of each of the shelves can be corrected.
  • FIG. 19B is a view taken from above the shelf. Both ends of the back of the transparent raw material 750 of the shelf are cut into a triangle shape and each of the mirrors 751 , 752 , and 753 is arranged at the central part and both ends, respectively. The image reflected at the mirror 751 is projected to the front of the shelf and the image reflected by each of the mirrors 752 , 753 is projected to the side of the shelf.
  • FIG. 20A is a view taken from above
  • FIG. 20B is a view taken from side
  • FIG. 20C is a view taken from front, respectively.
  • a part of light 754 projected from below is reflected by the mirror 760 and projected directly to the front end of the shelf.
  • Another part 755 is reflected by the mirror 761 , reflected by a surface 762 cut in a slant direction as viewed from above the lower portion, cut in a vertical direction as viewed from a horizontal direction, reflected in a slant upward direction by a surface 763 cut in a slant direction as viewed from the front both ends of the lower portion and projected to a side 764 of the shelf.
  • a surface 762 cut in a slant direction as viewed from above the lower portion cut in a vertical direction as viewed from a horizontal direction
  • a surface 763 cut in a slant direction as viewed from the front both ends of the lower portion and projected to a side 764 of the shelf.
  • FIGS. 21A to 21D there will be described a method detecting a state of the front of the shelf while a sensor is arranged at the back of the shelf.
  • a bar-code reader 770 is arranged at the back of the shelf, and light of the bar-code reader passes through the inner portion of the shelf of raw material such as acryl resin or glass with a high transmittance.
  • the bar-code reader 770 reads the bar-code of the goods, sends the read value to the PC 130 in FIG.
  • an infrared ray proximity sensor 772 is arranged at the back of the shelf, the sensor detects at 733 that a person approaches to the front of the shelf or applies his hand over the front, similarly the sensor transmits it to PC 130 in FIG. 1 and then the corresponded information is displayed.
  • FIG. 21C shows an example in which the camera is mounted below the transparent shelf to detect whether or not the goods are removed from the shelf.
  • FIGS. 22A to 22C there will be described a method in which the end of each of the shelves has a touch panel function.
  • an infrared ray camera with an infrared ray projector is mounted near a location such as a side part of the projector 110 in FIG. 1 so as to attain the image at the end of the shelf in a direction opposite to the optical path facing from the projector to the end of the shelf.
  • the image having a bright touched portion and remaining dark portions can be attained as shown in FIG. 22B , for example, and it is possible to detect which position in which shelf is touched by the customer.
  • FIG. 23A is a side elevational view of a shelf
  • FIG. 23B is a rear view
  • FIG. 23C shows an example of goods to which a bar-code is attached.
  • the rear of the shelf is provided with a movable bar-code reader 790 , its position is controlled from PC 130 in FIG. 1 , and a bar code 792 of the goods 791 at this position is read and transmitted to PC 130 .
  • An optical path 793 of light transmitted from the projector 110 , reflected by the mirror 111 and advanced upward is partitioned by either the transparent raw material or formed into a hollow state partitioned by the transparent raw material and then the bar code of the goods 791 can be read from the rear.
  • the goods can be individually managed, a work such as an inventory can be simplified.
  • the bar code to be attached to the goods is printed at either a tape or seal-like raw material having a capacitor or RFID tag assembled therein, thereby it can be simultaneously utilized as one for preventing any gate-type theft.
  • FIGS. 24A and 24B there will be described a method for displaying information about the goods or the like at the end of a shelf when the items such as goods placed on the shelf portion are removed by a customer coming to a store or the like.
  • FIG. 24A shows a state before goods 800 are removed from the shelf, in which general information or information about entire goods, for example, is displayed at an end 801 of the shelf.
  • a RFID tag reader 802 is arranged at the upper surface of a shelf and an RFID tag is attached to the goods 800 .
  • FIG. 24B shows a state just after the goods 800 is removed and what type of goods is removed is detected with RFID tag reader 802 .
  • Individual information about the removed goods is displayed at the surface 803 of a shelf to enable detailed information about the goods removed by a customer coming to a store to be displayed.
  • Reference numeral 810 denotes information such as prices of the goods placed on the shelf that corresponds to the conventional price tags.
  • Reference numerals 811 and 812 denote displays about an advertisement of the goods concerned.
  • Reference numerals 813 , 814 , and 815 denote displays about a store promotion that indicate the number of points, recruitment of members and thanks messages for customers coming to the store or the like.
  • Reference numeral 816 denotes a display for use in visually guiding a traffic line for a customer coming to a store.
  • Reference numeral 817 denotes a display indicating the position of goods.
  • Reference numeral 818 denotes a display for use in guiding a customer coming to a store to an escaping path at the time of emergency.
  • Reference numerals 819 , 820 , 821 , and 822 denote examples for displaying information attracting the interest of a customer coming to a store, for example, weather forecast, news, horoscope and music played in the store or the like.
  • FIG. 26 shows its configuration. None is arranged at the front of the transparent raw material 830 such as an acrylic block, a screen raw material 831 is attached to the acrylic block at the back of a shelf and there is provided a mirror 832 reflecting the image from below to the screen raw material and projecting it.
  • the transparent raw material 830 such as an acrylic block
  • a screen raw material 831 is attached to the acrylic block at the back of a shelf and there is provided a mirror 832 reflecting the image from below to the screen raw material and projecting it.
  • FIGS. 27A to 27D show side elevational views of shelves to show a positional relation between the back screen and a position of point of view.
  • FIG. 27A when the point of view is sufficiently far from a shelf and placed at the same height of the shelf, an image of the back screen 840 can be seen as it is.
  • FIG. 27B looking at a point of view 841 near to some extent shows that light is totally reflected at the upper part and lower part of the shelf, a part of the light can be seen in a correct opposite state and another part of the light can be seen under its upside down state.
  • FIG. 27A shows that light is totally reflected at the upper part and lower part of the shelf, a part of the light can be seen in a correct opposite state and another part of the light can be seen under its upside down state.
  • FIGS. 28A and 28B are views taken from above the shelf and show a positional relation between the back screen and the position of point of view. It is possible to see the image projected to the back screen in response to a reflecting characteristic inside the shelf as well as in the case that the point of view 850 is placed at the front of the shelf as shown in FIG. 28A and in the case that the shelf is seen from the slant point of view 851 in the same manner as that of the side.
  • FIG. 29 shows an example in which the effect described in reference to FIGS. 27 and 28 is embodied under application of a display device such as a liquid crystal display or a plasma display in place of projecting an image at the end of the shelf by the projector and the mirror.
  • a display device such as a liquid crystal display or a plasma display
  • the back of the shelf is provided with a display 860 and its front is provided with a shelf plate 861 of transparent raw material such as acryl or glass.
  • FIG. 30 shows an example using a rear projection system in place of the aforesaid display device.
  • the back of the shelf is provided with a screen raw material 870 and its front is provided with a shelf 871 of transparent raw material such as acryl.
  • the image projected from a projector 872 is projected by the mirror 873 to the screen 870 .
  • It can be utilized as a shelf-like display machine capable of effectively transmitting information on goods to a store visiting customer at the store selling goods.

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